Gillian Cross 
Great Elephant Chase [EPUB ebook] 

A giant Indian elephant. A wild journey across America. An enemy who will never stop. Tad and Cissie are on the run with Khush the elephant. Clammy-fingered, steely-eyed Hannibal Jackson will do anything to capture the animal. Maybe even kill . . . Staying ahead means being faster and smarter – but how do you hide an elephant? Especially one with a mind of its own…